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Compressing Streams: Direct Deflater, read and deflate the data Java code example - Click here to copy ->>>

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/* Title: Hardcore Java
* Title: Java I/O
* Second Edition: May 2006
* ISBN 10: 0-596-52750-0
* ISBN 13: 9780596527501
*/

Code:

 
import java.io.*;
import java.util.zip.*;

public class DirectDeflater {

  public final static String DEFLATE_SUFFIX = ".dfl";

  public static void main(String[] args) throws IOException  {
 
    Deflater def = new Deflater();
    byte[] input = new byte[1024];
    byte[] output = new byte[1024];

    for (int i = 0; i < args.length; i++) {
        FileInputStream fin = new FileInputStream(args[i]);   
        FileOutputStream fout = new FileOutputStream(args[i] + DEFLATE_SUFFIX);
       
        while (true) { // read and deflate the data     

          // Fill the input array.
          int numRead = fin.read(input);
          if (numRead == -1) { // end of stream
            // Deflate any data that remains in the input buffer.
            def.finish();
            while (!def.finished()) {
              int numCompressedBytes = def.deflate(output, 0, output.length);
              if (numCompressedBytes > 0) {
                fout.write(output, 0, numCompressedBytes);
              } // end if
            }  // end while
            break; // Exit while loop.
          } // end if
          else {  // Deflate the input.
            def.setInput(input, 0, numRead);
            while (!def.needsInput()) {
              int numCompressedBytes = def.deflate(output, 0, output.length);
              if (numCompressedBytes > 0) {
                fout.write(output, 0, numCompressedBytes);
              } // end if
            }  // end while
          }  // end else           
        } // end while
        fin.close();
        fout.flush();
        fout.close();
        def.reset();
    }
  }
}
 



References.

The list of classes which were used on this page you can find below. The links to Java API contain official SUN documentation about all used classes.

  java.util.zip.Inflater

  java.io.IOException

  java.util.zip.Deflater




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